1.5 Etiology Flashcards
1
Q
malocclusion due to both ___ and the ___ ___
A
genetics
functional matrix
2
Q
class 1 malocclusion prevalence (caucasians)
A
70%
3
Q
___ of class 2 are bimax retrusion
A
40%
4
Q
class 2 is mostly ___ ___
A
Mn retrognathism
5
Q
typical class 2 (3)
A
Mn retrognathism
incisor proclination
deep bite
6
Q
___ and ___ dimensions are variable in class 1 malocclusion
A
vertical
transverse
(AP WNL)
7
Q
how is transverse dimension measured
A
IM distance
IC distance
8
Q
SNA =
A
Mx
9
Q
SNB =
A
Mn
10
Q
most class 3 are due to ___ ___
A
Mx retrognathism
11
Q
class 3 most common with ___
A
asians
12
Q
open bite etiologies (4)
A
transitory
skeletal (genetic)
neuromuscular
combination sleep apnea
13
Q
WNL overbite
A
15-20%
14
Q
deep bite due to either ___ ___ or ___ ___
A
incisor overeruption
molar undereruption
15
Q
Dr R oligodontia definition
A
missing > 4
